SET processes in Lewis acid-base reactions: the tritylation of N-heterocyclic carbenes.
SET processes in Lewis acid-base reactions: the tritylation of N-heterocyclic carbenes.
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DOI:
10.1039/d0sc01278e
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发表时间:
2020-04-09
期刊:
影响因子:
8.4
通讯作者:
Severin K
中科院分区:
文献类型:
--
作者:
Dong Z;Pezzato C;Sienkiewicz A;Scopelliti R;Fadaei-Tirani F;Severin K
Reactions between N-heterocyclic carbenes (NHCs) and the trityl cation, [Ph3C]+, give covalent adducts of type [NHC–CPh3]+ and/or [NHC–C6H5–CPh2]+. EPR spectroscopy, UV-Vis analyses, and trapping experiments imply that adduct formation involves carbene radical cations and the trityl radical. The results demonstrate that single electron transfer (SET) processes should be considered for reaction of NHCs with oxidizing Lewis acids. Carbenes as single electron donors: the tritylation of N-heterocyclic carbenes proceeds via an initial SET step, giving highly reactive carbene radical cations and the trityl radical.
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